Hi @alcerot and welcome to the forum.
Yes, there are 2 ways to update your collections; via frontend function or via backend.
Frontend:
Just create a new frontend function on your form (e.g on load or after saving) and select the collection you want to update (just for your login):
Backend:
If you want to do it e.g. inside a trigger function you can select update collection from the instance function. From there you add the collection id and an array of logins you want to update the collection for.
